Pulp

Replace configMaps with better featured K8s Custom Resources

Because ansible operators use them by default, they specifically watch for changes to them, and because the variable names are simpler.

This commit includes:

Making more options configurable

Switching to the stable tag for the "pulp" image It (3.0.0rc4) actually contains drf 3.9.4, and therefore works.

Let users easily define their own Custom Resources

Rename the pulp image "version" to "tag"

Note: Automatic camelCase conversion of CR field names necessitates using snake_case

fixes: #5069 containers: Replace configMap with better featured custom resources https://pulp.plan.io/issues/5219

re: #5116 Handle properly whether to build container images with pulpcore stable or dev https://pulp.plan.io/issues/5116

containers: Build both stable and dev images

and make images far more configurable.

Implementation includes:

Build stable and master (latest) versions (tags) of both images.

Use an undefined plugins list for no plugins ather than the dummy pulpcore-plugin.

Use variables for the pulpcore & pulpcore-plugin pip installs

Use vars/vars.yml as an override for vars (including the images data structure.)

Start work on installing into the container, and limit the CI builds to only pulpcore & pulpcore-plugin stable.

fixes: #5116 Handle properly whether to build container images with pulpcore stable or dev (Actually does more than that.) https://pulp.plan.io/issues/5116

Includes some work on: re: #5062 Create pulpcore and pulp_file container images automatically via CI https://pulp.plan.io/issues/5062